Eupogonius fulvovestitus Schaeffer, 1905

Wappes, James E. & Santos-Silva, Antonio, 2020, Nomenclatural notes on some currently known species of Eupogonius LeConte, 1852 (Coleoptera: Cerambycidae: Lamiinae) and description of seven new species, Insecta Mundi 748, pp. 1-30 : 2-4

Eupogonius fulvovestitus Schaeffer, 1905

( Fig. 1–8 )

Eupogonius fulvovestitus Schaeffer 1905: 134 ; 1908: 328 (distr.); Leng, 1920: 284 (cat.); Aurivillius 1922: 311 (cat.); Linsley and Martin 1933: 182 (distr.); Knull 1954: 128 (new status); Breuning 1963: 505 (cat.); 1974: 21 (rev.); Hovore et al. 1987: 313 (distr.); Chemsak et al. 1992: 119 (checklist); Monné 1994: 30 (cat.); Monné and Giesbert 1994: 221 (checklist); Monné and Hovore 2006: 247 (checklist); Lingafelter et al. 2014: 67 (type); Bezark 2019b: 285 (checklist).

Eupogonius vestitus var. fulvovestitus ; Knull 1946: 264 (new status).

Redescription. Female ( Fig. 5–8 ). Integument light reddish-brown to dark brown; base of anteclypeus and apex of labrum testaceous; posterior area of gulamentum brown; anterior area of pronotum brown; basal 2/3 of antennomere III brown; basal 2/3 of antennomere IV light reddish-brown; trochanters and base of femora from brown to dark reddish-brown; and basal 3/4 of tibiae light reddish-brown (lighter on pro- and mesotibiae), with distal quarter or less darker brown; metatarsomeres I–IV from reddishbrown to nearly black; elytra with irregular shining reddish-brown punctate maculae.

Head. Frons coarsely, abundantly punctate; with abundant white pubescence not obscuring integument, with yellowish pubescence interspersed centrally and laterally; with long, erect, abundant dark setae. Vertex and area behind upper eye lobes with sculpturing as on frons; sides of vertex and area behind upper eye lobes with dense yellow pubescence; central area of vertex with a few short, erect brown and white setae; with long, erect, sparse dark setae. Area behind lower eye lobes with sculpturing as on frons; with dense yellow pubescence close to eye, gradually sparser toward prothorax, with long, erect white setae interspersed. Antennal tubercles with sculpturing as on frons except distal area smooth; with white pubescence anteriorly, yellow posteriorly; with long, erect, sparse dark setae. Genae finely, sparsely punctate close to eye, wide distal area smooth; with decumbent yellowish and white setae not obscuring integument, apex glabrous. Postclypeus coarsely, abundantly punctate on wide central area, sparser laterally; with white pubescence not obscuring integument; with long, erect, sparse dark setae. Labrum coarsely, sparsely punctate, except nearly smooth area close to anteclypeus; with short, sparse, decumbent white setae interspersed with long, decumbent dark setae on posterior 2/3, and fringed with dense yellow setae anteriorly. Gulamentum smooth, posteriorly glabrous, slightly depressed, finely punctate, with long, erect, sparse dark setae anteriorly. Distance between upper eye lobes 0.5 times length of scape; in frontal view, distance between lower eye lobes 1.1 times length of scape. Antennae 1.1–1.3 times elytral length, typically noticeably falling short of elytral apex. Scape coarsely, abundantly punctate; with bristly white pubescence not obscuring integument dorsally, sparse brown pubescence ventrally, with long erect, abundant dark setae interspersed throughout (with a few long, erect white setae ventrally). Pedicel with long, erect, abundant dark setae throughout. Antennomere III with sparse white setae on light area, brown, sparser on remaining surface; with abundant long, erect, dark setae throughout (longer ventrally); antennomere IV with abundant white setae on light area not obscuring integument, sparse brown setae on remaining surface; with long, erect, abundant white and dark setae on light area, and long, erect dark setae on distal area. Antennomeres V-X with dark brown pubescence; with long, erect dark setae ventrally, gradually sparser toward X, and long, erect, yellowish and dark setae dorsally (distinctly shorter than ventrally). Antennomere XI dark brown pubescent, with minute yellowish-white setae, and long, erect yellowish-white setae interspersed (longer, more abundant distally). Antennal formula (ratio) based on length of antennomere III: scape = 0.73; pedicel = 0.18; IV = 0.85; V = 0.36; VI = 0.29; VII = 0.27; VIII = 0.27; IX = 0.24; X = 0.20; XI = 0.29.

Thorax. Prothorax transverse; sides widened centrally, with small, irregular tubercle. Pronotum coarsely, abundantly punctate; sides of anterior third with dense yellow pubescence; sides of posterior third and center of posterior quarter with yellow pubescence (distinctly denser laterally); sides of central area with white pubescence partially obscuring integument; central area of anterior half with sparse yellow pubescence; central region between middle and posterior quarter with sparse white pubescence and a few decumbent yellow setae interspersed; with long, erect, moderately sparse dark setae throughout, and a few long, erect, white setae on sides of anterior half. Sides of prothorax with sculpturing as on pronotum; with dense yellow pubescence anteriorly and posteriorly, sparse, white pubescence centrally close to pronotum, sparse, yellow close to prosternum; with sparse, long, erect, white setae. Prosternum and prosternal process coarsely, sparsely punctate; with white pubescence not obscuring integument. Mesoventral process with white pubescence not obscuring integument; mesanepisternum and mesepimeron with yellow pubescence partially obscuring integument. Metanepisternum with yellow pubescence not obscuring integument (whiter anteriorly). Metaventrite coarsely, abundantly punctate laterally (punctures distinctly coarser than on pronotum); with yellow pubescence close to metanepisternum, white, sparser on remaining surface. Scutellum glabrous centrally, margined with white pubescence; with long, erect, sparse dark setae. Elytra. Coarsely, abundantly punctate (punctures separated by their diameter or more) on basal third, gradually finer, sparser toward apex; apex together rounded; with large, irregular, abundant, dense maculae with yellow pubescence, white pubescent band along suture (sparser toward apex), and white pubescence between yellow maculae, gradually sparser toward apex; with long, erect, abundant dark setae throughout. Legs. Femora with yellow pubescence and long, erect white setae interspersed. Tibiae with long, abundant, erect and decumbent white setae. Tarsi with white pubescence not obscuring integument.

Abdomen. Ventrite I with white pubescence not obscuring integument, densely fringed with yellow setae across apical margin; ventrites II–IV with abundant yellow setae laterally, yellowish-white, sparser centrally, and dense fringe with yellow setae across apical margin; ventrite V with abundant yellow setae laterally, and white setae centrally; ventrites I–IV with long, erect, sparse white setae; ventrite V with long, erect, sparse white setae anteriorly, dark posteriorly; posterocentral area of ventrite V slightly inclined toward apex.

Male ( Fig. 1–4 ). Body typically smaller and proportionally narrower than female. Antennae 1.2–1.4 times elytral length, almost reaching or slightly surpassing the elytral apex.

Dimensions (mm), male (1 specimen measured) / female (1 specimen measured). Total length, 6.60/6.15; prothoracic length, 1.25/1.20; anterior prothoracic width, 1.30/1.35; posterior prothoracic width, 1.35/1.40; maximum prothoracic width, 1.55/1.50; humeral width, 1.95/2.05; elytral length, 4.65/4.40.

Material examined. Texas, Starr Co., Fronton Preserve (26°24′N / 99°06′W; dead branches of sugar hackberry), 1 male, 3.IV.2018, J.E. Wappes col. ( MZSP); (26°24′N / 99°08′W; collected beating small branches of sugar hackberry with wilted leaves); same data except: 28.III.2018, 2 males, 5 females (1 female, MZSP remainder ACMT) ; same data except 6.IV.2016, 2 males, 2 females ( ACMT) ; same data except 30.III.2017, 5 males, 3 females ( ACMT) ; same data except 8.IV.2018, 3 males, 1 female ( ACMT) .

Remarks. Schaeffer (1905) described the species based on three specimens from Texas. Although the sex was not mentioned, the antennae were described as “little longer than the entire body” (which is also true in the syntype figured by Lingafelter et al. (2019)) making them males. In the original description, antennomere IV is reportedly “equal to third” but in the material before us it is slightly shorter than III in all specimens (including in the syntype figured by Lingafelter et al. 2019).

Linsley and Chemsak (1985) briefly described the female as: “Form similar. Antennae shorter than body. Abdomen with last sternite impressed at apex.” In the series of 11 females examined we find the fifth ventrite to be broadly transverse with barely a hint of an impression on the apex (not readily vis- ible even when present).

The species remains known only from south Texas where it has been collected in a riparian habitat beating small shade killed or broken branches of Celtis laevigata Willdenow (Cannabaceae) ( Fig. 9–10 ).

Figures

Figures 1–8. Eupogonius fulvovestitus. 1–4) Male. 1) Dorsal habitus. 2) Ventral habitus. 3) Lateral habitus. 4) Head, frontal view. 5–8) Female. 5) Dorsal habitus. 6) Ventral habitus. 7) Lateral habitus. 8) Head, frontal view.

Figures 9–10. Riparian habitat bordering the Rio Grande river where Celtis laevigata, the probable host plant of Eupogonius fulvovestitus and from which adults have been collected, abounds.